https://www.pbainbridge.co.uk/2023/04/google-form-checkbox-responses.html

Google Form Checkbox responses.gs

function getFormData(e) {

  // get all Form responses
  var formValues = e.namedValues;

  // get response to specific question
  var pizzaTopping = formValues["Favourite Pizza Topping"][0];
  console.log("pizzaTopping is: " + pizzaTopping);


  // use JavaScript 'includes' to match text
  if (pizzaTopping.includes("Chicken")) {

    console.log("Likes Spicy Chicken");

  } else {

    console.log("Does not like Spicy Chicken");

  };


}